470
Buzzer, Backlight, and Display Control
Section 8-2
[Operation]
When the screen where the buzzer attribute has been set is displayed during the
operation of the NT31/NT31C, the buzzer sounds automatically according to the
setting. For the procedure for changing the screen, refer to 8-3-1 “Switching the
Screen” (page 480).
Sounding the Buzzer by the Operation at the Status Control Area
This method allows the operator to sound the buzzer at any required time.
Buzzer sounds
← Control data
PCNT31/NT31C
PT status control area
Screen switch setting
Copy memory
table setting
PT status control setting
Reserved for system use
[Setting]
The PT status control area must be allocated to a word in the host and, according-
ly, there are no special settings required for the control of buzzer.
[Operation]
The bit for controlling the PT status (PT status control bit) is provided at the fourth
word (n + 3 words) from the beginning of the PT status control area.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit
0
0
Controlled Item
Screen display
Processing priority registration (for NT link (1:N))
Continuous buzzer
Intermittent buzzer (short)
Display history initialization
Not used
Intermittent buzzer (long)
Backlight mode
Screen printing
PT window opening
Numeral/character string input
PT screen switching
Memory table copy execution
Memory table copy type
Alarm history initialization
Not used
1 (ON)
Performed
Registered
Sounded
Sounded
Performed
Sounded
Lit
Performed
Disabled
Disabled
Disabled
Performed
Numeral
Performed
0 (OFF)
Not performed
Canceled
Stopped
Stopped
Not performed
Stopped
Flashing
Not performed
Enabled
Enabled
Enabled
Not performed
Character string
Not performed
Always “0”
Always “0”
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
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